Third Eye Chain Watcher

Comments about Third Eye Chain Watcher:

It's one of the few options out there (and pretty much the only readily available one) to prevent chain skip on the inside chainring. It works as advertised.

I had a hard time installing it because my downtube ended up being in the way of the little screw tightener hole (the bolt should should have an allen head, not a phillips head like everything else on a bike), but once I got it on there it was fine. I haven't had chain skip even when shifting under tension on climbs since I installed it.